dorxter¼
kiwifarms.net
- Joined
- Jun 1, 2020
I am hung up on the ballistics of the supposed .30-06 round that was used. Wiki shows the distance at 426ft. A .30-06 round will be traveling at ~2,800 feet per second. Using speed of sound as 1,125 fps. With the bullet traveling faster than the speed of sound, we should see the impact about 0.227ms before we hear the shot.
The math:
Time for bullet sound to reach kirk: 426ft/1125fps=0.377ms
Time for bullet to reach kirk: 426ft/2800fps=0.152ms
Difference: 0.227ms
I've only looked at the two most commonly shared video files. One has the impact on video happening between a timestamp of 1.7 seconds and 1.733 seconds while the audio shows the gun shot at 1.63 seconds. (bullet traveling slower than speed of sound)
The other video shows the impact happening between timestamps of 25.333 seconds and 25.367 seconds while the gun shot audio happens at 25.317 (again, showing the bullet is traveling slower than the speed of sound)
Has this been discussed anywhere before?
Yes, I am aware that cell phones do a lot of image processing and can have large sync issues between video and audio. But at least in the videos I am looking at, the vocals seem to line up pretty well with mouth movements. So it just seems odd. It is also odd that the wound damage is more typical of a round traveling close to the speed of sound. Once projectiles get past the 2000 fps range, they start to really make a mess of things.
The math:
Time for bullet sound to reach kirk: 426ft/1125fps=0.377ms
Time for bullet to reach kirk: 426ft/2800fps=0.152ms
Difference: 0.227ms
I've only looked at the two most commonly shared video files. One has the impact on video happening between a timestamp of 1.7 seconds and 1.733 seconds while the audio shows the gun shot at 1.63 seconds. (bullet traveling slower than speed of sound)
The other video shows the impact happening between timestamps of 25.333 seconds and 25.367 seconds while the gun shot audio happens at 25.317 (again, showing the bullet is traveling slower than the speed of sound)
Has this been discussed anywhere before?
Yes, I am aware that cell phones do a lot of image processing and can have large sync issues between video and audio. But at least in the videos I am looking at, the vocals seem to line up pretty well with mouth movements. So it just seems odd. It is also odd that the wound damage is more typical of a round traveling close to the speed of sound. Once projectiles get past the 2000 fps range, they start to really make a mess of things.